Orthodontic appliance



FIG. 1 is a perspective view of an orthodontic appliance showing my newdesign;

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side elevational view thereof, the left side being amirror image;

FIG. 5 is a bottom plan view thereof; and

FIG. 6 is a front elevation view thereof.

The ornamental design for an orthodontic appliance, as shown anddescribed.